Ex-security chief willing to testify against Uribe: W Radio .

The jailed ex-security chief of former president Alvaro Uribe is willing to officially testify against his old boss and other senior officials, claimed W Radio Wednesday.

Uribe's former chief of security, Mauricio Santoyo, is willing to implicate the ex-president and other top officials, according to "highly credible" sources in the armed forces, said W Radio. It is alleged that Santoyo made the move in an attempt to secure a reduced sentence.

Santoyo is currently incarcerated in the U.S. for collaborating with the now defunct paramilitary group AUC. His convictions stemmed from acts of illegal wiretapping, intimidation, kidnappings and disappearances.

Santoyo also previously acknowledged accepting bribes from paramilitary members in exchange for giving them information about police operations being carried out against them.